Delta Rewards flights can also be canceled for a full refund within the 24-48 hour risk-free period. So read the blogs below to know about Delta Airlines cancellation policy and Delta flight cancellation policy 24 hours and similar information. Delta Rewards flights can also be canceled for a full refund within the 24-48 hour risk-free period. So read the blogs below to know about Delta Airlines cancellation policy and Delta flight cancellation policy 24 hours and similar information.Delta Rewards flights can also be canceled for a full refund within the 24-48 hour risk-free period. So read t